Multitubular boiler



March 4, 1941. s. L. KELLKNG 2,233,537

MULTITUBULAR BOILER Filed Dec. 9, 1938 zayz. 1

' ATTORNEYS Patented Mar. 4, 1941 UNI-TED MULTITUBULAR BOILER.

Scott L. Kelling, J efierson City, Mo. Application December 9,1938,Serial No. 244,847

1 Claim.

My invention relates to multitubular boilers of the water tube type andhas as one of theprincipal objects thereof the provision of a boilerwherein the tubes are so arranged as to quickly heat the watercirculating therethrough thus maximizing the heating eificiency of theboiler as well as effecting an economy in fuel.

Another object of my invention is to provide a boiler of the characterdescribed which is simple in construction, durable in use, eificient inoperation and economical in manufacture,

Other objects and advantages will be apparent from the followingdescription, appended claims and annexed drawing. 15 Referring to thedrawing wherein like refer ence characters designate like partsthroughout the several views:

Figure 1 is a longitudinal sectional view of my invention and taken onthe line l! of Figure 2. 20 Figure 2 is a sectional view taken on theline 2-2 of Figure 1.

In practicing my invention I provide a boiler 5 comprising upper andlower sections 6 and 1 respectively, said upper section constituting aWater jacket fashioned with spaced inner and outer side walls 8 and 9respectively and inner and outer top walls Ill and II respectively.

The lower ends of the side walls 8 and 9 are welded to a plate [2fashioned with a centrally 30 disposed aperture in which is positioned afire grate l3 supported by said plate and adapted to receive thereonfuel for operating the boiler in a manner hereinafter setforth. Thelower section I constitutes an ash pit, access being had 35 thereto bymeans of a hinged door 14 mounted on the front of the boiler. Adjacentthe upper and lower ends thereof, the water jacket is fashioned withshells l5 extending through the inner and outer walls 8 and 9 on thefront of the boiler and constituting clean out and fuel feed openings l6and I! respectively. Said openings l6 and I! are closed by doors I8.

The inner and outer walls of both the side and top of the water jacketdefine a water chamber I9 therein and the upper end of said chambercommunicates with an outlet connection 20 adapted for connection to thefeed pipe (not shown) of a heating system. The lower end of the waterchamber I9 has communication with connectionsii adapted to be connectedto return pipes of said system. A water supply pipe 22 is connected tothe lower end of the jacket whereby to supply said jacket with water asdesired.

The lower section of the water jacket defines a fire box in which thefuel on the grate is coning tubes 25 welded to the inner wall of thejacket and having communication at their respective ends with the watercompartment. Said tubes are arranged in diagonal relation and inalternate directional planes. The upper section of the tube chamber hasextending therethrough a plurality of upper and lower tubes 26 and 21respectively which converge towards one side of said boiler andinterposing said upper and lower tubes 26 and 21 and the lowerdiagonally arranged tubes 25 are spaced baflle plates 28 havingalternate ends spaced from the front and rear of the jacket. Subjacentthe inner wall H], the rear of the jacket has extending therethrough asmoke pipe connection having communication with the upper end of thetube chamber and is adapted to be connected toa chimney or the likewhereby smoke is carried from the boiler.

Due to the angular positions of the tubes within the boiler, a greaterquantity of water will be subjected to the heat from the fire box thanin instances where said tubes are arranged in horizontal positionswithin a boiler having a similar size tube compartment and fire box,thereby greatly reducing the time required for heating the water in thetubes and at the same time effecting an economy in fuel. The baffleplates serve to circulate the heated air about the tubes and to ellect aconcentration of said heated air subjacent the top of the water jacketwhereby the water therein is maintained at a high temperature forcirculation into the feed pipe of the system.

Also, return water from the system is introduced into the water jacketat a point surrounding the fire box whereby said water is heatedconsiderably before being circulated through the tubes.

It is obvious that the invention is not confined I to the hereindescribed use therefor as it may be utilized for any purpose to which itis adaptations, I said upper section constituting a water jacket formedwith a tube compartment and a fire box defined by the lower end of saidjacket and about which water is adapted to circulate, a plurality ofdiagonally arranged tubes mounted in the lower portion of saidcompartment above side of said 'jacket and communicating with the saidfirst mentioned tubes.

latter, and heme plates mounted in said compartment and interposing saidfirst mentioned tubes and said second mentioned tubes andthe tubes ofeach series whereby to circulate heat from said fire box about saidtubes'for effecting the heating of water circulating upwardlytherethrough, said first mentioned'tubes being disposed in alternatedirectional planes for maximizing the heating of water circulatingthrough SCOTT "Ll KE'LLING.

